Crown-sheet of steam-boilers



(No Model.) El CROWN SHEET 0E STEAM BOILERS. N0. 461,180. Patented Oct. 13, 11891.

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ERNST HEUER, oF FORT WAYNE, INDIANA.

CROWN-SH EET oF sTEAMfBoiLERs.

SPECIFICATION forming part of Letters Patent No. 461,180, dated October 13, 1891.

Application filed June 8, 1891. Serial No. 395,559. (No model.)

To @ZZ whom, it may concern,.-

Be it known that I, ERNST HEUER, a citizen of the United States, residing at Fort Wayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Crown-Sheets of Steam-Boilers; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to certain new and useful improvements in crown sheets of steam-boilers, and especially to the manner of fastening the bolts connecting the staybars to the crown-sheet; and it consists in the novel construction and arrangement of parts hereinafter fully described, and afterward pointed out in the claims, due reference being had to the accompanying drawings, forming a part of this specification, wherein- Figure 1 is a side elevation showing the crownsheet and the stay-bar in position thereon; 2, a similar Viewv showing one of the plates composing the stay-bar removed, and Fig. 3 a vertical section taken' on the line Fig. 1, and Fig. 4 a plan view of one of the plates composing the stay-bar.

Referring to the drawings, the letter A indicates the crown-sheet of a steam-boiler.

B indicates one of the stay-bars, consisting of twoparallel plates l) b, having downwardlycurved ends b o', the lower inner ends of which are curved, as at b2 b2, to rest upon the upper curved edges of the crown-sheet, as shown.

C indicates bolts screw-threaded at their lower ends and flattened at their upper ends and perforated, as at c. Said bolts are tapped into the crown-sheet and so arranged that their flattened upper portions shall lie in the samelongitudinal plane. The plates b b, composing the stay-bar B, lie upon each side of the flattened ends of the bolts C and are perforated, as at h3 b4, the perfor-ations b3 registering with the perforations c in the flattened ends of the bolts C, and through said perforations are passed headed pins D, perforated near their ends, as at d, and secured in place by keys d d. Through the perforations b4 in the plates c c are passed bolts E, by means of which, and nuts e, the said plates are firmly bound together.

By employing the iiattened bolts held in the stay-bars, as shown, said bolts and staybars are bound very rigidly to the crownsheet and the bolts prevented from turning, it being impossible for the vwarping of the crown-sheet to displace or disturb the stay-bar and its fastenings.

Having described my invention, what I claim is- 1. In a steam-boiler, the combination, with the crown-sheet, of stay-bars, each consisting of two arch-shaped plates resting upon the edges of the crown-sheet and united by bolts, and bolts tapped into said crown-sheet and liattened at their upper ends, said flattened ends being secured between the plates composing the staybar, substantially as described.

2. In a steam-boiler, the combination, with the crown-sheet, of stay-bars, each consisting of two arch-shaped plates resting upon the edges of the crown-sheet and united by bolts, bolts tapped into said crown-sheet and flattened at their upper ends, and pins passing through the said flattened ends of the bolts and through the stay-bar and fastened by means of keys, substantially as described.

3. The combination, with the crown-sheet A, of the stay-bars B, each consisting of the parallel arch-shaped plates b b, having their lower inner ends curved, as at b2 1:12, to embrace the edges of the crown-sheet and united by bolts E, bolts C, tapped into the crownsheet and attened at their upper ends and embraced by the plates c c, and pins D, passing through said plates and through the fiattened ends of said bolts and fastened by key's d, substantially as shown and described.

' In testimony whereof I affix my signature in presence of two witnesses.

ERNST HEUER.

Vitnesses: v

P, WV. BoGGs, M. TANCEY. 

